Dehydration of 1,5-pentanediol over rare earth oxides

详细信息	查看全文 | 推荐本文 |

• 作者：Fumiya Sato ; Hiro Okazaki ; Satoshi Sato ; ^{satoshi@faculty.chiba-u.jp}
• 关键词：Dehydration ; 1 ; 5-Pentanediol ; 4-Penten-1-ol ; Rare earth oxides ; Bixbyite ; Reactivity
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：29 March, 2012
• 卷：419-420
• 期：Complete
• 页码：41-48
• 文件大小：456 K

摘要

Vapor-phase catalytic dehydration of 1,5-pentanediol was investigated over rare earth oxides (REOs) at 325-450 掳C. The conversion of 1,5-pentanediol over REOs calcined at 700 and 800 掳C was higher than that calcined at 500 掳C. Sc₂O₃, Yb₂O₃, and Lu₂O₃ with cubic bixbyite structure showed the selectivity to 4-penten-1-ol with higher than 74 mol%, while REOs with hexagonal and monoclinic structures showed the selectivity with less than 50 mol%. Especially, Yb₂O₃ and Lu₂O₃ calcined at 1000 掳C showed high formation rate of 4-penten-1-ol per specific surface area over 1 mmol h^鈭? m^鈭? at 400 掳C. In the Yb₂O₃ catalyst calcined at 800 掳C, the conversion of 1,5-pentanediol was increased up to 74.4 mol%with increasing contact time, together with stable selectivity to 4-penten-1-ol of 71.8 mol%. In comparing the reactivity of alkanediols to form the corresponding unsaturated alcohols over Yb₂O₃, we found the reactivity of alkanediols into the corresponding unsaturated alcohols was the following order: 1,4-butanediol > 1,3-diols 鈮?#xA0;1,5-pentanediol 鈮?#xA0;1,6-hexanediol.